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Finding the Fourth Proportional to 18,428.64, 27,642.83 and 8,562.44

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Solution

The fourth proportional to 18,428.64, 27,642.83 and 8,562.44 is: 12,843.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.64 : 27,642.83 = 8,562.44 : x
  2. Step 2: Convert to fraction form
    18,428.64/27,642.83 = 8,562.44/x
  3. Step 3: Cross multiply
    18,428.64x = 27,642.83 × 8,562.44
  4. Step 4: Simplify right side
    18,428.64x = 236,689,892.28
  5. Step 5: Solve for x
    x = 236,689,892.28/18,428.64
  6. Step 6: Final answer
    x = 12,843.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.